I put a new bearing in the rear end and now it leaks. I was told I might need to put in a new yoke or sleeve on the yoke. It's a 12 bolt 69 rear, how do I determine spline count ?
Any thoughts ?
Thanks.

Pinion bearing? If so, Did you put some sealer around the outer metal portion of the pinion seal before installing? Also you should apply sealer to the splines of the pinion/yoke.